.header-wrapper {
	position: fixed;
	left: 0;
	right: 0;
	top: 0;
}

.nav-wrapper {
	position: fixed;
	left: 0;
	right: 0;
	top: 44px;
}

.mask {
	position: fixed;
	z-index: 1000;
	left: 0;
	right: 0;
	top: 0;
	bottom: 0;
	background: rgba(0, 0, 0, 0.5);
}